[time-nuts] Anybody have experience with TimeMachines TM1000AGPS Time Server

[Azelio Boriani]

The GPGSV is the sentence that reports satellites'  SNR. See also:
<http://www.gpsinformation.org/dale/nmea.htm#GSV>

On Mon, Nov 10, 2014 at 10:59 AM, Lizeth Norman <normanlizeth at gmail.com> wrote:
> Rick,
> NMEA 0138 is a standard "language". Yes it does output the signal
> strength and visible sats, although I don't remember which output
> sentences give that data.
> I haven't looked at the serial output, so I don't know which sentences
> are supported. Probably good to look at the documentation  for the gps
> chip.
> Norm n3ykf
>
>
> On Mon, Nov 10, 2014 at 12:54 AM, Rick Thomas <rbthomas at pobox.com> wrote:
>> Hi Lizeth,
>>
>> I’ve noticed that it’s very quick to come to a preliminary lock — though the lock is often exactly 1.000 sec off for 5-10 minutes.  Eventually that fixes itself.
>>
>> Do you know if the NMEA output (once enabled, and once there is a listener to record it) would tell which satellites are visible and at what signal strength?
>>
>> Mine is also just for home use for the time being.  I’m planning to get another one for use at the community radio station I volunteer at.
>>
>> They are cheap enough that, with a grant from e.g. the NSF, we could get a bunch of them and scatter them all over the Internet.  With enough of them and some open software for monitoring, we could map one-way (as opposed to round-trip) times on various Internet routes — thus giving some hard data on route asymmetry.  This might prove to be interesting or even useful in diagnosing problems.
>>
>> Just a thought…
>>
>> Rick
>>
>> On Nov 9, 2014, at 2:07 PM, Lizeth Norman <normanlizeth at gmail.com> wrote:
>>
>>> Reading the manual, (page 8) the device can be set up to output NMEA
>>> over the serial port. There are a few different pieces of code to
>>> display that data.
>>> Have had mine two weeks. It got gps lock before I could point the
>>> browser at it's ip.
>>> Just syncing a bunch of cameras as well being the "house" time standard.
>>>
>>> On Sun, Nov 9, 2014 at 4:49 PM, Rick Thomas <rbthomas at pobox.com> wrote:
>>>>
>>>> Right.  I did the reset to factory defaults jumper thing and it came back to life.  I’m using it now with the default setup.
>>>>
>>>> I got a reply from somebody named Doug at css-timemachines suggesting that I use a different browser (I had been using Safari on my desktop Mac) so I switched to Chrome (still on the Mac) and now it seems to be a bit more friendly.
>>>>
>>>> In particular, it reports:
>>>>
>>>>     Signal Strength: Satellite 1: 32 dB, Satellite 2: 31 dB, Satellite 3: 30 dB
>>>>
>>>> Can anybody tell if that’s good or bad?  I have the antenna taped up against a window with a good view of the sky to the North-East: not too many trees in the way of a clear view out over the ocean — but somewhat occluded to the North-West: a low tree-covered ridge up to about 15 degrees above the horizon — and the bulk of the house in the way to the South.  Is there a better way?
>>>>
>>>> I’ll report here as I explore further over the next week.
>>>>
>>>> Rick
>>>>
>>>> On Nov 9, 2014, at 2:21 AM, David C. Partridge <david.partridge at perdrix.co.uk> wrote:
>>>>
>>>>>> If you’re referring to this:
>>>>>
>>>>> I think he’s referring to section 4.3 "Resetting to Factory Defaults"
>>>>
>>>>>> You also have to reboot after a PW change ...
>>>>>
>>>>> Regards,
>>>>> David Partridge
>>>>
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